vpnor: Rename mboxd_pnor_partition_table sources to backend

Change-Id: I6f0fff4ab54e011c1765fc04186e899754787641
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/vpnor/test/create_read_window_remap.cpp b/vpnor/test/create_read_window_remap.cpp
index f81d1bc..5e25412 100644
--- a/vpnor/test/create_read_window_remap.cpp
+++ b/vpnor/test/create_read_window_remap.cpp
@@ -16,7 +16,7 @@
 #include <fstream>
 #include <vector>
 
-#include "vpnor/mboxd_pnor_partition_table.h"
+#include "vpnor/backend.h"
 
 static const auto BLOCK_SIZE = 4096;
 static const auto ERASE_SIZE = BLOCK_SIZE;